Question

isaac spends $81 on books and journals for his 3 cousins. for each of his 3 cousins, he buys a book that costs x dollars and a journal that costs $14.
use the tape diagram to help you write an equation to represent this problem.
tape diagram with three sections labeled x + 14 and total 81, and a blank section below

Explanation:

Step1: Identify total cost per cousin

Each cousin gets a book ($x$) and a journal ($14$), so per cousin: $x + 14$

Step2: Multiply by number of cousins

There are 3 cousins, so total cost: $3(x + 14)$

Step3: Set equal to total spent

Total spent is $81$, so equation: $3(x + 14) = 81$

Answer:

$3(x + 14) = 81$